Hayward Lake is a lake and reservoir on the Stave River in the Lower Mainland of British Columbia, Canada. Located in the District of Mission about 60 km east of Vancouver, Hayward Lake is formed by Ruskin Dam, which lies about 3 km upstream from the Stave River's confluence with the Fraser River at Ruskin, which sits astride the Mission-Maple Ridge boundary. The lake begins at the tailrace from the Stave Falls Dam and is about 7.5 km in length and an average of 0.5 km wide, with a maximum width of 1.5 km when lengths of small inlets are taken into account.